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G. R.- DUNN.

SNAP HOOK.

No. 42,357. Patented Apr. 19, 1864.

AisirrED `Sierras PATENT OFFICE GEORGE R. DUNN, OF NEWARK, NEW JERSEY;

-sNAP-HQOK.

Specification forming part of Letters Patent No. 42,357, dated April 19, 18.64.

To @ZZ whom' it may concern:

lBe it known that I, GEORGE R. DUNN, ot Newark, in the county -ot Essex and State of New J ersey, have invented a new'aud useful Improvement in Snap-Hooks; and I do hereby declare 'the' following to be a full and exact ,description of the same, reference being had to the accompanying drawings, making part of thisspeciiication, in which- Figurel is a perspective view of my improvedlsnap-hook on an enlarged scale.` Fig. 2 is a central longitudinal section ofthe same.

Similar letters-ot' reference indicate corresponding parts in the two figures.

y This invention relates to a snap-hook of peculiarfconstruction, which, 'besides being in itself' of a more durable character than snaphooks heretofore devised, is adapted to be' converted at a very triiling .cost into a new article when the spring has become unservice- I able by wear or accident, as will be explained.

In order that others skilledin the art to which my invention appertai'ns 'may be enabled to fully understand and use the same, I will proceed to describe its construction and operation.

In the accom panying drawings, A may represent the main body of the snap-hook, which in general outline ot' form may coincide with 4the hook in common use-tliat is to say, the

body is curved in customary manner, as shown at a, in order that the spring D when secured in position will be pressed against the nose B.

C represents the central portion of my improved hook, the same being made hollow,'as

shown`at c, for the purpose to be explained. The spring D may be formed of a narrow strip of steel perforated at oneend, so as to adapt it tu be fastened to the flat end a! of the body A by means of a screw, d, for the reception ot' wbicha suitable screw-threaded aperture is made in the tint end al.

The spring D passes through the aperture c in the "cylindrical portion 0,. said aperturebeing suicie'ntly large to permit the requisite? movement of` the spring when the hook is toi be hitchedor unhitched. Snap-hooks as hitherto constructed are frequently rendered totally useless in consequence of the spring becoming deranged by a lateral pull or strain. In my -invention thev cylindrical easing C serves to brace the spring D, and thereby'pre-b vent it from being broken, or from becoming deranged by being turned laterally upon the --screw d, by which itis attachedto the-body-A.

The manner described of i attaching the spring is at once simple and effectual. When the spring has once been thus secured the screw, .without the aid of any accessory device,

will be sufficient to retain it until the springbecomes useless byservice or accident. My'i'nvention also adapts the spring D to be readily" replaced by a new one when it has become worn or broken, and thus the most valuable part ot' the implement is preserved and made use of. y

- A snap-hook of the above construction is not only valuable lon account of its lasting." property,but possesses the additional desideral tum of being adapted to be -made .a new article of, every now'and then.

Having thus described my invention, the

following'is what I claim as new and desire' tol secure by Letters Patent:

As a new article of manufacture, the snaphook hereinbefore described, consisting of a cast-metal body, A, a detachableA spring, D, secured by a screw, d, and passing through and protected by the socket C, all constructed and arranged as specified. y y

GEORGE R. DUNN.

Witnesses:

JonN BENSON, ROBERT LANG. y 

